Regulator for charging storage batteries.



- S F. BRiGGii REGULATOR FOR CHARGING STORAGE BATTERIES. v

APPLICATZON FILED FEB. :2. $915.

1 ,26Q,9 1 'Y Iiatemtedi 16, W18.

UNIT-Vii} STE PHEN F. BRIGGS, 0F Ii-ZILWJiUiKE' COMPANY, OF MILWIA'UKEE, i

Resonance, role as Application flied Fchrnary 1 To all whom it may concern:

Be it known that I, STEPHEN a citizen of the United States, a of Milwaukee, in the county of and State of Wisconsin, have i" and useful Improvements in Regulators for Charging Storage Batteries, the following is a description, reference being had to the aceoinpanynagdrawings which are a part of this specification.

This invention relates to vibrating rcgu tors for controlling the charging stoi I batteries with electrical current rangin i .voltage between narrow limits from a gen erator driven atwidely varying speeds, a d has for its object to render such a more constant in its operation so as to itain its regulating viorations under all working conditions. Another object of the invention is to accomplish this result by the use of a vibrator pole piece and armature so constructed and arranged that after the initial movement ofthe armature toward. its attracted position a part of the magnetic flux or the direction of flow of some of the lines of force is approximately angles to the direction otmovem armature,. thus diminishing the force of the magnet and permits L armature retracting means to become more effective.

With the above and other objects in view the invention consists in the regulator for charging storage batteries as herein clamied, and all equivalents.

Referring to the accompanying drawings in which llke characters of reference indicate the same partsin the difierent "views: Figure 1 is a side View of a vihra regulator constructed in accordance a it: this invention;

Fig. 2 is an end View thereof Fig. 3 is a plan view thereoi with the stationary contact holder sectioned and. with the armature in its outer position;

Fig. 4 is a similar view of a fragment of the device with the armature in its extreme inner position of the armature;

peciiicatien oi her:

I arm by the e by the magnet, separated by the atthe magnet. The

though not necessar. 3r, .4 ye covered by my co-pen'e lug application Serial No. 866,232 filed Octeber 12., 5.91 2.

consis; of three contact disks cunt-es. on an in u sting pin 19 which mclv b3 O1]. Stationary disk and s. .lOOSGl 'OFLSS illll l'Oll 'll the Ollllfil iiWO disks and an opening in the armature 14 as ention does not reof these contacts 18, v substituted ation. between the red by cutting away he edge of pole P1605; e corne: portions or the edge or rendering said; interfitting so faces planes e ofrnovo- Ji l-i .'L

ts eorripie t i, c

I 13, and this tions 29 at the ends of the active face of the pole piece 13, and a central projection 21 on the end of the armature 14 to closeiy fit between said horns or projections 20. In the outer position of the armature 14 in which its projection 21 is wholly-outside of the space between the horns 20 the form'ae tion of these active faces of the armature and pole piece has but little, if any, efi'ect on the attraction of the pole piece for its armature, but as the armature is drawn closer to the pole piece, bringing its projection 21' 7 22 and has a binding post 23 connected with its core 12. The spool is wound with numerous turns of fine wire forming a shunt magnet coil 24-with one end grounded on the core of the magnet, and the other endconnected with a binding post 25. The

spool is also wound. with a few turns of lar e wire forming a series coil 26 with one emf connected with. the stationary contact 17 and the other end connected with a binding post 27. Another binding post 28 is connected with the stationary contact 18.

In connecting up the regulator of this invention with a generator and storage battery the binding post 23 is connected with one terminal of the generator armature 29, the positive terminal, while the other terminal thereof is connected with one end of the shunt field winding 30, its other end being connected to the binding post 28. A field regulating resistance 31 is connected between the binding posts 23 and 28 and a storage battery 32 has one terminal connected with the binding post 27 and the .other terminal connected with the negative terminal of the generator armature. It will be seen that the shunt magnet coil 24 is permanently connected across the terminals of the generator armature, whereas the series magnet coil 26 is included in series with the storage battery in a circuit controlled by'the contacts 17 ,and the shunt field winding 30 of the generator is permanently connected acrossthe erminals of-the armature of the generator with or without the resistance 31 in series ierewith, according to the position of the vibrator contacts 18 which merely serve to short circuit said resistance. If desired, a condenser 33 may be connected across the vibrator contacts 18, as by com necting the terminals thereof with the binding posts 28 and 23 respectively.

In operation the rotation of the generator armature 29 which may be driven in any suitable manner, as by a gearing connection with an automobile engine or the like, causes a flow of current through the shunt magnet coil 24, as well as through the shunt field winding 30 without the resistance 31 in series therewith, vibrator contacts 18 being closed, but without cu rent passing through the series magnet coil 26 or the storage battery 32, as the switch contacts 17 are open, and this condition continues until the speed. of rotation of the armature is such that the voltage generated thereby is sufiicicnt for the purpose of charging the storage battery. When such voltage is reached the current strength is sufficient to cause the shunt magnet coil 24 to energize the magnet to a degree that will enable it to attract the arniatures 14 and 15 against the action of their springs. The closing of the switch contacts 17 closes the charging circuit through the storage battery and increases the strength of the magnet by energizing the series magnet coil 26 while the opening of the vibrator contacts 18 serves to weaken the field winding of the generator by including the resistance 31 in series therewith, thus causing the voltage of the generator to drop and reduce the attractive force of the magnet so as to release the armature 14 to again short circuit the resistance 31 and restore the stren h of the field winding of the generator an permit the armature to again attain its maximum voltage. This operation is rapidly repeated from which fact the device is designated as a Vibrator. The voltage of the battery charging circuit is thus prevented from exceedinga predetermined maximum voltage even though the speed of rotation of the armature of the generator varies widely. The contact points 17 remain closed as long as the armature speed is suflicient to maintain the predtermined voltage for the hat- I tery charging circuit, but as soon as it falls below this speed the resulting loss of strength of the magnet permits the contacts 17 to open and thus prevent a discharge of the storage battery. In the event of a delayed opening action of the contacts 17 permitting the generator voltage to fall below the battery voltage the battery current in discharging through the series coil. 26 causes it to oppose or tend to neutralize the effect of the shunt coil 24 and thus weaken the magnet to facilitate tic opening of the switch contacts 17. 1

The difiiculty which is common to vibrators of this type is that the vibrator arma -f ture will-occaslonally stick to the pole ibce and thus fail to give regulation. W'hi e its approach to the ole piece is accompalfied by the opening 0 the switch contacws to inopened an i closed by the the armature, yielding means the armature away from the the contacts closed, a generator electric current to the magnet 70 n battery charging circuit, and educing the voltage of the magnncl the 1 trhcluce resistance the iielci circ generator and thus reduce thevol generator circuit Weaken the lilft llc-j, battery circuit through the e efiected. and at times nearly charged this is sui'lioien; the increased pull of the me. reduction of the air to hol armature notwithstanding of resistance The consti. I tor armature and pole piece overlap to an increasin, ture approaches its to Weaken the in addition to. the Weeks &

voltage due to intrccuct sistence 31 in fieh. thus prevents the armature attracted position and seen i turn to its outel." position the disengagement of t interrupted operation 0 t. tacts is thus assured, result ous regulation of the volt '25 battery cherging circuit "i of the storage battery at generator It is obvious that the of obtaining the overlap 80 tween the vibrator ernisti piece which is here illuso. folthe purpose of tionlis not essential to the i contemplates other modes 85 the overlapping relation or lines of force to recluse t of the magnet, as will re. skilled in the art, and the inv confined in its use to eutoinohii, 4 able for central station z Wherever voltage regulation magnetically controlled CGIZEMQ",

ployed.

What i claim as new and to secure 5 by Letters lp etent in:

cattery charging circuit 0y the switch contacts, said :tion of the armature and ce serving to diminish magnet for the manamoves to its attracted to the reduction in not clue to the decreased the contacts and thereby ature being held by the L forstoragehatterychargnpiising an electroinagnet wring retracted movable 1e gap between. the pole an inteifitting overlapone of the pole pieces to otion of the magnet therc- 11W its attracted position, a

"tutor for energizing the a battery charging cirfield circuit, a regulating A the shunt field circuit, 2d switch contacts short dating resistance and rents of the armature the magnet, the combineil nluction of the regulate and of the interfitting overtior of the armature and pole i'ovent the armature being the pole piece.

for storage battery comprising a shunt series magnet coil, a nature bridging the pole et and having an interrelation with one of the c uppin 1. In a regulator iorhattery pieces to reduce the attraction of the cuits, a vibrator, comprising mag J svthereior the armature approaches ing pole pieces, pivotell l mounted urineture britlging the be ween the pole 59 pieces, one of pole pieces and ti sins.

ture interfitting with each cti coll connected across the terhave an increasing overhippi s armature and having a battery ducing the attractive force of L t Y circu't also connected across the the armature approaches armature and including a 55 tion and contacts engageci incl. the se'ies magnet coil,

'by tae movements of the erzna switch contacts short circuit- 2. In a regulator for cattery Glut resistance, one of which cuits, :1 vibrator c'oznpi'is riccl hy said armature so that not having pole, pieces, removed and the regulatfor bridgin the gap between i l in the shunt fielcl cirone of the pole pieces and the 1 attracts the armature, interfitting so as to have incr e of the introduction lapping relation as the cc and or" the inits 'ttrac'tecl position to Mtiou of the arme- 6 -enc of the magnet on to prevent the r ted position, a variable speed gem h e shunt WlDCl'LIlg includtinsg resi ice and having the 115 armature being held b the pole piece, a second spring retracte armature bridging across-the pole pieces of the magnet, and a second pair of switch contacts normally 5 opened and one of which is carried by the second armature, said second pair of switch contacts being included in and controlling the battery charging circuit.

- 5. In a vibrator, a magnet having pole pieces, a spring retracted movable armature bridging across the pole pieces and having cut away portions at its ends with a projection between them, the corresponding pole piece having projections at its end to fit 1 within the cut away portions of the armature and a recess between the projectionsto receive the projection of the armature whereby the armature and said pole piece have an interfitting overlapping relation with each other in the attracted position of the armature, and a pair of switch contacts opened and closed by the movements of the armature.'- I

6. In a vibrator? a magnet having pole pieces, a spring retracted movable armature ridging, across the pole pieces, one of the pole pieces and the armature being interfitting so asto have an increasing overlapping relation as the armature approaches its attracted position to weaken the influence of I net strength.

7. In a vibrator, a magnet having pole ieces, a spring retracted movable armature ridging across the pole pieces, one of the pole pieces and the armaturebeing interfitting so as to'have an increasing overlapping relation as the armature approaches its attracted position to weaken the influence of the magnet on the armature, a pair of switch contacts opened and closed by the movements of the armature, and a regulating resistance controlled by the switch contacts in circuit with the electromagnet for weakening the magnet-strength, the combined influ ence of the regulating resistance and of the interfittingoverlapping relation of the or mature serving to revent the armature be ing held by the poi; piece.

,8. In a generator output regulator,.a regulating resistance, 'a magnet controlling same, and means for reducing the attractive effect of the magnet supplemental to the introduction of the r sistance.

9. In age aerator output regulator, a regulating resistance, and a magnet havin an armature controlling the reslstance, sai armature having an overlapping relation with the pole piece of the magnet to reduce the attractive effect of the magnet supplemental to the introduction of the resistance.

In testimony whereof, I afiix my signature, in presence of two witnesses.

STEPHEN F. BRIGGS.

Witnesses:

KATHERINE Hour, MARGARET R. FORRESTAL. 

